Collect.js is a fluent and convenient wrapper for working with arrays and objects. The JavaScript array is first transformed into a collection and then the function is applied to the collection.
The collapse() method convert collection of arrays into a single flat array.
Installation:
- Collect.js can be installed via NPM:
npm install --save collect.js
- You can also use CDN of collect.js
<script src="https://cdnjs.com/libraries/collect.js"></script>
Syntax:
collect(array).collapse()
Parameters: The collect() takes one argument that is converted into the collection and then collapse() function is applied on it, which will convert into a single flat array.
Return Value: Returns an array.
Below examples illustrate the collapse() method in JavaScript:
Example 1: Here collect = require(‘collect.js’) is used to import the collect.js library into the file.
const collect = require('collect.js'); let arr = [1, [1, 2], [{}, 3]] // convert array into collection const collection = collect(arr); // collapsing the array into single array const collapased = collection.collapse(); // returning the array with all() method. let singleArray = collapased.all(); console.log("Single array: ", singleArray); |
Output
Example 2:
const collect = require('collect.js'); let arr = [[1, 2, 3, 4], [5, 6, 7, 8], [9, 10]] // convert array into collection const collection = collect(arr); // collapsing the array into single array const collapased = collection.collapse(); // returning the array with all() method. let singleArray = collapased.all(); console.log("Single array: ", singleArray); |
Output
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